I'll have to let you kick it around for a while today. I'm out of ideas.
As long as you've activated the custom fields with the Layout Designer, this should work.
Troubleshooting suggestions:Put the (%CUSTOMVARS%) macro back into the template. You should surround it with HTML comments to make that easier to find in browser source code mode.
<!-- Custom Variable Macro Code START -->
(%CUSTOMVARS%)
<!-- Custom Variable Macro Code END -->
Then load TTX and view the source HTML in your browser. Find and isolate all the HTML inserted by the (%CUSTOMVARS%) macro.
Then you can compare the official TTX code for the custom fields with your custom code for the two new custom fields. Maybe a little piece is missing I can't think of right now. Remember I don't have that module so I can't look at anything here.